A

A

S

0

1

0

0

A1

A2

A0

0

Start

Condition

ACK

From Slave

ACK

From Slave

Data

Data

Slave Address

R/W

P7

P6

1

P0

P7

P0

A

Integral Multiples of Two Bytes

P5

SCL

SDA

Write to

Port

Data Output

Voltage

P5 Output

Voltage

P5 Pullup

Output

Current

INT

ACK

From Slave

Data A0

and B0

Valid

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

PCF8575C

www.ti.com

SCPS123F – MARCH 2005 – REVISED JANUARY 2015

8.3.3 Address Reference

INPUTS

8-BIT READ

8-BIT WRITE

A2

A1

A0

ADDRESS

ADDRESS

L

L

L

65 (decimal), 41

64 (decimal), 40

(hexadecimal)

(hexadecimal)

L

L

H

67 (decimal), 43

66 (decimal), 42

(hexadecimal)

(hexadecimal)

L

H

L

69 (decimal), 45

68 (decimal), 44

(hexadecimal)

(hexadecimal)

L

H

H

71 (decimal), 47

70 (decimal), 46

(hexadecimal)

(hexadecimal)

H

L

L

73 (decimal), 49

72 (decimal), 48

(hexadecimal)

(hexadecimal)

H

L

H

75 (decimal), 4B

74 (decimal), 4A

(hexadecimal)

(hexadecimal)

H

H

L

77 (decimal), 4D

76 (decimal), 4C

(hexadecimal)

(hexadecimal)

H

H

H

79 (decimal), 4F

78 (decimal), 4E

(hexadecimal)

(hexadecimal)

8.4 Device Functional Modes

Figure 13 and Figure 14 show the address and timing diagrams for the write and read modes, respectively.

Figure 13. Write Mode (Output)

Copyright © 2005–2015, Texas Instruments Incorporated

Submit Documentation Feedback

15

Product Folder Links: PCF8575C